package com.atguigu.practice;

import java.math.BigInteger;
import java.util.Scanner;
public class TheTriangleJudge {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            BigInteger a = new BigInteger(scanner.next()); //1
            BigInteger b = new BigInteger(scanner.next()); //2
            BigInteger c = new BigInteger(scanner.next()); //3
            if(a.add(b).compareTo(c)>0 && a.add(c).compareTo(b)>0 && b.add(c).compareTo(a)>0){
                //a+b>c && a+c>b  &&  b+c>a
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
}
